このエントリーをはてなブックマークに追加
ID 118
Eprint ID
118
FullText URL
Title Alternative
Studies on the Chemical Composition of Glasshouse Vine Soils, with Special Reference to the Accumulation of Excess Soluble Salts in the Soils. : II. On the Changes of Salinity and Nitrate Contents of Glasshouse Vine Soils.
Author
Yoneda, Shigeo
Kochi, Masamichi
Yanai, Masayoshi
Abstract
In a previous investigation it was observed that the nature of glasshouse vine soils resembled more or less to that of semiarid soils and sometimes, a large amount of soluble salts, especially sulfate and nitrate, was found to accumulate in old glasshouse soils. A further study was taken to obtain detailed information on the characteristics of glasshouse soils, with special reference to the seasonal change of salinity and nitrate content of these soils associated with vine affected by apparent excess soluble salts. The soils investigated in this study were taken in July 1957, January 1958 and December 1958 from vine glasshouse, distributed in Ichinomiya-cho, Okayama Prefecture. Electrical conductivity, pH, humus and nitrate nitrogen were determined and soluble salts and 10 % HCL soluble constituents were analysed with some typical soils. The following general conclusions were drawn: 1) The normally dominant ions in the 1: 5 extracts were Ca. SO4 and NO3, but sometimes K, Mg, Na and Cl ions were relatively high also. 2) Of 10 % HCL soluble constituents, CaO and SO3 were markedly high in surface soil and P2O5 and K2O were relatively high also as compared to normal arable soils in Japan. It was shown that the greater part of P2O5 was fixed to surface layer but a fairly amount of K2O was also contained in lower layers. 3 ) No significant differences in soil salinity and nitrate content were shown between the soil samples taken in summer time and those taken in winter time. On the contrary, the soil crust scraped from soil surface in winter time contained a large amount of soluble salts, especially nitrate. Of all the samples examined, as much as 60 % showed the conductivity more than 15 millimhos/cm and contained nitrate nitrogen more than 600 p.p.m. The dominant salt in saturated extracts of soil crusts was calcium nitrate and a part of calcium sulfate was also found in these extracts. 4) The salinity and nitrate content were significantly decreased by renewal of surface layer of old glasshouse with fresh hillside soil deposits, accompanied with the increase of yield and improvement of quality of grape. The findings are believed to warrent the conclusions that the renewal of surface layer of old glasshouse is the best remedy for vine suffered injury from high concentration of salts.
Published Date
1960
Publication Title
岡山大学農学部学術報告
Volume
volume15
Issue
issue1
Publisher
岡山大学農学部
Publisher Alternative
Faculty of Agriculture, Okayama University
Start Page
33
End Page
42
ISSN
0474-0254
NCID
AN00033029
Content Type
Departmental Bulletin Paper
language
日本語
File Version
publisher
Refereed
False
Eprints Journal Name
srfa